This is an odd question probably, but can someone tell me the size heater hose (as in ID) I need to buy for a '79 Regal with a Pontiac 301 please? I want to say it's either 5/8 or 3/4, but can't remember which. Or maybe it's neither? I need to replace one, but the car is in storage at my parents' and I don't want to drive all the way there to just measure a hose. Could someone help me out? Thanks in advance.
